A deteriorating, heavily-used Long Island bridge over railroad tracks is going to be replaced. But that means a year of detoured traffic, and snarled road closures near the busy Roosevelt Field Mall in Nassau County.

Sen. Charles Schumer is demanding that both of New York’s big commuter railroads — not just the one that suffered a fatal derailment — test their engineers for sleep apnea, the disorder blamed for the 2013 accident.